3. I saw Joe and Cathrine with son, Harry. 4. My mother helped me with homework.
5. This is their book. Those other books are too.
6. Clara didn’t have a ticket, so I gave her .

3. I saw Joe and Cathrine with their son, Harry.

4. My mother helped me with my homework.

5. This is their book. Those other books are theirs too.

6. Clara didn’t have a ticket, so I gave her mine.